Raw shelled sunflower seeds

I know that CLA comes from sunflower oil, and the roasting of roasted/salted kernels destroys most of the CLA. I've been eating a lot of raw shelled sunflower seeds in my P+F meals. Does anybody know how much CLA is in 1/4 cup of these, or if it's doing me any good at all? When I was out of flax oil, I was eating up to 2 cups a day.